Two-Dimensional Microstructure-Based Model for Evaluating the Permeability Coefficient of Heterogeneous Construction Materials
The permeability coefficient of construction materials plays a crucial role in engineering quality and durability. In this study, a microstructure model based on real aggregate shape and digital image technology is proposed to predict the permeability coefficient of concrete. A two-dimensional, thre...
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2023-08-01
|
| Series: | Materials |
| Subjects: | |
| Online Access: | https://www.mdpi.com/1996-1944/16/17/5892 |
| _version_ | 1797582259098746880 |
|---|---|
| author | Jiaqi Chen Shujun Yu Wei Huang Hao Wang |
| author_facet | Jiaqi Chen Shujun Yu Wei Huang Hao Wang |
| author_sort | Jiaqi Chen |
| collection | DOAJ |
| description | The permeability coefficient of construction materials plays a crucial role in engineering quality and durability. In this study, a microstructure model based on real aggregate shape and digital image technology is proposed to predict the permeability coefficient of concrete. A two-dimensional, three-component finite element model of cement concrete was established considering the interfacial transition zone (ITZ) between aggregate and mortar. The permeability coefficient prediction model was developed by the finite element method. The accuracy of the model was verified by experimental data, and the influence of the water−cement ratio on the permeability coefficient of concrete was analyzed. The results show that this method has good prediction accuracy with a relative error of 1.73%. According to the verified model, the influences of aggregate content, aggregate characteristics, aggregate location, ITZ thickness, and other factors on the permeability of concrete were explored. The higher the water−cement ratio, the higher the permeability coefficient. With the increase in aggregate content, the permeability coefficient decreases. Aggregate permeability has a significant influence on the effective permeability coefficient of concrete within a certain range. The greater the roundness of aggregate, the greater the permeability of concrete. On the contrary, the larger aggregate size causes lower permeability. The permeability coefficient of concrete with segregation is lower than that with uniform distribution. At the same time, the permeability increases with the increase of ITZ thickness. |
| first_indexed | 2024-03-10T23:18:30Z |
| format | Article |
| id | doaj.art-7aa2778f7fa6459b98780614c3e94c9a |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-10T23:18:30Z |
| publishDate | 2023-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-7aa2778f7fa6459b98780614c3e94c9a2023-11-19T08:27:23ZengMDPI AGMaterials1996-19442023-08-011617589210.3390/ma16175892Two-Dimensional Microstructure-Based Model for Evaluating the Permeability Coefficient of Heterogeneous Construction MaterialsJiaqi Chen0Shujun Yu1Wei Huang2Hao Wang3Department of Civil Engineering, Central South University, Changsha 410075, ChinaDepartment of Civil Engineering, Central South University, Changsha 410075, ChinaDepartment of Civil and Environmental Engineering, Rutgers, The State University of New Jersey, Piscataway, NJ 08854, USADepartment of Civil and Environmental Engineering, Rutgers, The State University of New Jersey, Piscataway, NJ 08854, USAThe permeability coefficient of construction materials plays a crucial role in engineering quality and durability. In this study, a microstructure model based on real aggregate shape and digital image technology is proposed to predict the permeability coefficient of concrete. A two-dimensional, three-component finite element model of cement concrete was established considering the interfacial transition zone (ITZ) between aggregate and mortar. The permeability coefficient prediction model was developed by the finite element method. The accuracy of the model was verified by experimental data, and the influence of the water−cement ratio on the permeability coefficient of concrete was analyzed. The results show that this method has good prediction accuracy with a relative error of 1.73%. According to the verified model, the influences of aggregate content, aggregate characteristics, aggregate location, ITZ thickness, and other factors on the permeability of concrete were explored. The higher the water−cement ratio, the higher the permeability coefficient. With the increase in aggregate content, the permeability coefficient decreases. Aggregate permeability has a significant influence on the effective permeability coefficient of concrete within a certain range. The greater the roundness of aggregate, the greater the permeability of concrete. On the contrary, the larger aggregate size causes lower permeability. The permeability coefficient of concrete with segregation is lower than that with uniform distribution. At the same time, the permeability increases with the increase of ITZ thickness.https://www.mdpi.com/1996-1944/16/17/5892concretepermeability coefficientfinite element modelITZheterogeneous |
| spellingShingle | Jiaqi Chen Shujun Yu Wei Huang Hao Wang Two-Dimensional Microstructure-Based Model for Evaluating the Permeability Coefficient of Heterogeneous Construction Materials Materials concrete permeability coefficient finite element model ITZ heterogeneous |
| title | Two-Dimensional Microstructure-Based Model for Evaluating the Permeability Coefficient of Heterogeneous Construction Materials |
| title_full | Two-Dimensional Microstructure-Based Model for Evaluating the Permeability Coefficient of Heterogeneous Construction Materials |
| title_fullStr | Two-Dimensional Microstructure-Based Model for Evaluating the Permeability Coefficient of Heterogeneous Construction Materials |
| title_full_unstemmed | Two-Dimensional Microstructure-Based Model for Evaluating the Permeability Coefficient of Heterogeneous Construction Materials |
| title_short | Two-Dimensional Microstructure-Based Model for Evaluating the Permeability Coefficient of Heterogeneous Construction Materials |
| title_sort | two dimensional microstructure based model for evaluating the permeability coefficient of heterogeneous construction materials |
| topic | concrete permeability coefficient finite element model ITZ heterogeneous |
| url | https://www.mdpi.com/1996-1944/16/17/5892 |
| work_keys_str_mv | AT jiaqichen twodimensionalmicrostructurebasedmodelforevaluatingthepermeabilitycoefficientofheterogeneousconstructionmaterials AT shujunyu twodimensionalmicrostructurebasedmodelforevaluatingthepermeabilitycoefficientofheterogeneousconstructionmaterials AT weihuang twodimensionalmicrostructurebasedmodelforevaluatingthepermeabilitycoefficientofheterogeneousconstructionmaterials AT haowang twodimensionalmicrostructurebasedmodelforevaluatingthepermeabilitycoefficientofheterogeneousconstructionmaterials |